Control circuit, DCDC converter, and driving method

A control circuit comprising:

• a first potential line, a second potential line, a signal line, and a current generator circuit comprising:
• a constant current source;
• a first diode-connected transistor of a first conductivity type, the first diode-connected transistor being connected in series with the constant current source between the first potential line and the second potential line;
• a second diode-connected transistor of a second conductivity type different from the first conductivity type;
• a third transistor of the first conductivity type and comprising a gate connected to a gate of the first diode-connected transistor, the second diode-connected transistor and the third transistor being connected in series between the first potential line and the second potential line;
• first current mirrors electrically connected to the first potential line in parallel with each other, each comprising a fourth transistor of the first conductivity type and one further comprising a fifth transistor and a sixth transistor;
• second current mirrors electrically connected to the second potential line in parallel with each other, each comprising a seventh transistor of the second conductivity type and one further comprising an eighth transistor and a ninth transistor;
• and
• an output terminal,
• wherein the fourth transistors are connected between the first potential line and the output terminal,
• wherein, in the one of the first current mirrors, the fifth transistor and the sixth transistor are connected in series between the first potential line and the gate of the first diode-connected transistor, and a gate of the fourth transistor is connected to a first node between the fifth transistor and the sixth transistor,
• wherein the seventh transistors are connected between the second potential line and the output terminal,
• wherein, in the one of the second current mirrors, the ninth transistor and the eighth transistor are connected in series between the second potential line and a gate of the second diode-connected transistor, and a gate of the seventh transistor is connected to a second node between the ninth transistor and the eighth transistor,
• wherein the current generator circuit is configured to transmit a control signal of the signal line to a gate of the sixth transistor and to a gate of the eighth transistor, and to transmit an inverse of the control signal to a gate of the fifth transistor and to a gate of the ninth transistor, and
• wherein currents outputted by the first current mirrors and the second current mirrors can be supplied to the output terminal.